1322111161 has 4 divisors (see below), whose sum is σ = 1510984192. Its totient is φ = 1133238132.

The previous prime is 1322111137. The next prime is 1322111171. The reversal of 1322111161 is 1611112231.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1611112231 = 30911 ⋅52121.

It is a cyclic number.

It is not a de Polignac number, because 1322111161 - 2²¹ = 1320014009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1322111171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94436505 + ... + 94436518.

It is an arithmetic number, because the mean of its divisors is an integer number (377746048).

Almost surely, 2^1322111161 is an apocalyptic number.

It is an amenable number.

1322111161 is a deficient number, since it is larger than the sum of its proper divisors (188873031).

1322111161 is an equidigital number, since it uses as much as digits as its factorization.

1322111161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188873030.

The product of its digits is 72, while the sum is 19.

The square root of 1322111161 is about 36360.8465385502. The cubic root of 1322111161 is about 1097.5458126071.

Adding to 1322111161 its reverse (1611112231), we get a palindrome (2933223392).

The spelling of 1322111161 in words is "one billion, three hundred twenty-two million, one hundred eleven thousand, one hundred sixty-one".